Spindle encoder linuxcnc. revs net spindle-velocity encoder.

Spindle encoder linuxcnc the z is just tracking the spindle encoder, and the spindle is not being used as a c axis like in some peoples setups. g A being 0 and B being 1. The 7I85S encoder inputs are identical to the 7I96S encoder inputs so I would not expect a different result. There are only two belt positions/ratios specifically 1:2 and 2:1. The encoder driver (Mesa or HAL) then sets that pin to FALSE when the index is seen, and simultaneously zeros the encoder counts/position. Yumo COM-11102 Encoder 1024 P/R Today i installed it and it works perfectly. hi, I have the signal spindle at speed active at zero speed and the movement starts without waiting. Spindle Encoder Start; Prev; 1; Next; End; 1; Sourabh3; Offline; Senior Member More. spindle-forward and motion. scale 1. 5ms. Incidentally, LinuxCNC allows rigid-tapping without C-axis control, it slaves the Z axis to the spindle position encoder. pwm-freq 10 # TODO: See what this setting actually does # setp pwmgen. I just runned M19 R180,and the 0-muxtoabs-final-speed value is 0. LinuxCNC can use resolvers (all my machines use them) but you need different interface cards which is important. Excuse my lack of experience when it comes to encoders and Mesa card but what makes an I am New to Linuxcnc. If you found drives that use +-10V, those are velocity mode drives, so wiring the encoder to Linuxcnc makes them position mode control. n. 1 Spindle Synchronized Motion code be used and edited to the 7i96s? The X and Z axes were set up in the PncConfig as stepper motors without encoders regardless of them including encoders (1000 LPR) because their drivers have Digital Process Control. A Z index is basically good for positional use, getting the thread started in the right place each time, but you cannot cut good threads without at least an A pulse. To enable EMC to wait for the spindle to be at speed before executing a series of moves you need to set motion. The G96 and RPM corresponds with the encoder and the X and Z axis feed IPR okay lately, except, commanding the spindle doesn't match the RPM. So I have a total of 5 encoder places with the labeling being from 0-4. The encoder on the spindle (lets just focus on one of them for now) is a 512 pulse Sin/Cos encoder, which i am interpolating using the IC-NV package by a factor of 5, resulting in 2560 counts per rev, or 10240 in quadrature. I need an encoder for the spindle motor so I can achieve accurate threading. I'm running at ~500 rpm (which is the lowest speed). I'm hoping for a maximum spindle speed Linuxcnc maybe able to control the VFD and close the loop for positioning purposes. I am New to Linuxcnc. Can you please explain how to connect pin 14 as spindle on and pin 17 as spindle cw to hal and bob to motor. Picked up a 1000 P/R encoder from automation direct with a 200 kHz response. velocity => motion. input-index although I can see it triggering with a LED on the output of the encoder it does not show on the hal meter (false) with a multimeter in changes from 4. LinuxCNC can perform synchronized The difficulty with a lathe spindle is that it has a big hole in the middle, so you either need an encoder with a big hole, or a belt / gear drive with a 1:1 ratio or to make your own In some situations, it is nice to have a hardware control knob to override the spindle rotational speed. I have no feedback from the encoder, it is a 360ppr + index, non-quadrature encoder which I don't know how to setup. Running 2. I try this. in1 # connect one input to the encoder-measured spindle speed net spindle-velocity => near. 0 OUTPUT Configuring LinuxCNC. But I am unable to zero "spindle-revs" (count of spindle revolutions) with index enable machine start up with: net spindle-fb-rpm-abs => near. one resolution is the same as the encoder counts. Andy would have the wisest advice regarding this. I already have an Omron E6B2-CWZ1X @2000 P/R. The rest of the pendant IO is also wired to TB5 as follows axis select x 18, y 19, z 20, A 21, 1x step 22, 10x 23, 100x 24, and estop to 25. net spindle-position encoder. It is possible but I doubt that you have an absolute encoder on the spindle (listing the encoder interface pins will clear this up) Normally EMC keeps track of spindle position by using a incremental encoder with an index signal (A,B,Z signals with A,B being the quadrature signals and Z being the once-per-turn index signal) It is possible but I doubt that you have an absolute encoder on the spindle (listing the encoder interface pins will clear this up) Normally EMC keeps track of spindle position by using a incremental encoder with an index signal (A,B,Z signals with A,B being the quadrature signals and Z being the once-per-turn index signal) Optocouplers are connected to spindle encoder A/B/I inputs. I have 4 axis milling machine. This is so a PID spindle setup would be programmed directly in RPM. I have the mesa 5i25 with the 7i76 boards and looking for the This is an 11KW servo spindle without encoder-to-drive feedback on the motor. Hi Bengt, thanks again fo the reply. velocity => spindle. The PID is tuned to use Pgain=0, Igain=1, Dgain=1. The encoder is on the servo while the npn sensor is on the spindle. Been searching for a couple of days for the info. But it's also forwarding these signals to the controller. in2 # connect the output to the spindle-at-speed input net spindle-at-speed spindle I'm trying to determine which is the best spindle encoder to use. 85 amps and I would like to feed the encoder of my spindle back into the system. The rest should be done by "orient". The motor is a 1hp 3phase motor, likely the original motor, too. in net spindle-fb-rpm-abs abs. maybe there is a way to not have this signal at a standstill. Over that speed Halmeter shows bad values. As I said already had a single ended encoder because it was the same. The spindle tachometer is this DIY design that provides a single pulse per revolution on one wire. I used halscope at different speeds and to be honest none of the graph (even at low rpm) looks bad. net spindle-phase-a encoder. 2 PWM Spindle Speed and 12. counter-mode 1", and I can't figure out what to Rigid tapping requires Z tracking through reversals so you need A/B and perhaps index. Spindle feedback is needed by LinuxCNC to perform any spindle coordinated motions like threading and constant surface speed. Dual Phase singal channel (A phase and B Phase). Regards 1. counter-mode true # connect the HAL encoder outputs to LinuxCNC. PNCConf has already set "setp hm2_5i25. 6. 00 = 1 turn) Also the motion. You do not need close loop speed control as the Z axis motion is locked to spindle position (read from the encoder) when doing spindle synchrronized motion. If your current setup has a separate index pulse you can continue to use it with the new encoder. of course with any of the other mesa cards 7i90 etc then additional encoders can be added to the bit file I think perhaps I may have asked the wrong question - all encoders 'pulse' multiple times per revolution, so the question I should be asking is where do I set the encoder resolution for the spindle? Edit: Now that I've thought about the question, position-scale seems like a suitable candidate? Replied by tecno on topic Opto spindle Encoder 2 or 3? The test rig was never used on my lathe only play on lab bench, biggest problem was that laser cut was eccentric and did not perform well. The spindle is not being controlled by Linuxcnc, it's just an AC motor with a pulley. But now I and getting ppmc. out setp near. 2 Spindle At Speed. position-scale 48 # This is not a quadrature There is no encoder there, so spindle feedback is not possible unless an encoder was added, _but_ this looks like an engraver or router where spindle synchronized motion (the Anyway, the new (fleabay) Baldor' 'Vector Master' motor has a good A, A-, B, B- and Z encoder on the back end, and I wondered if I could use a timing belt (HTD series or similar) for the spindle drive with a 1:1 ratio, and use the encoder on 2. Also really like how the encoder is added to the spindle cartridge. Currently the machine has a disc with a single slot read by a c3 pulse net spindle-index encoder. setp encoder. 000 units/rev == spindle turns 1. First just need to find an encoder Looking for some additional information about selecting a spindle encoder for rigid tapping. If you are using hardware counters, you can use a much higher resolution encoder driven 1:1 off the spindle I use a 120 hole encoder disc, with software encoder component and a seperate Z phase index # connect the HAL encoder outputs to LinuxCNC. Likewise velocity seems to be correctly reporting RPS += 200RPM as I set. But when I actually start the spindle in linuxcnc, It starts and then runs away, continuously ramping up until I stop it. I have retrofitted my hardinge DV-59 with a 1 1/2 hp servo motor and controller. Toggle Navigation but If I'm going to tear into this I'd The spindle still does a couple of turns before it comes to a full stop and LinuxCNC has a "clean" encoder reader for a correct M19 call right after the M5. A rotary encoder is added to a South Bend SB1001 lathe DIY CNC setp encoder. The number I came up with was 133. 0Im Falle einer Mehrspindelmaschine ist alles, was sich ändert, dass zusätzliche Pins mit Namen wie spindle. Mesa jumpers are set to signle/TTL inputs. But, I still can't run in linuxcnc. I would also like to position the spindle using M19. spindle-revs) when it sees the index. To make this mechanically correct will work but I would advocate a 90 to 180 pulse A phase, if using the software encoder component and a disc type encoder on the spindle. If the encoder was mounted to the motor it is not They always have an A and B pulse. 8. I am using a Mesa 7i76e connected to a Raspberry Pi 4 with LinuxCNC installed following John Thornton's instructions. spindle-revs #net spindle-velocity encoder. enable pid. spindle-speed-in must be fed the spindle velocity in RPS (not RPM) So you can also program speed in Linuxcnc without encoder. If the encoder position does not change when the spindle moves its most likely an electrical or wiring issue. I thought first I would check here to see if I have made any and here is a link to the probe I have. The spindle is a brush motor, 115 VAC, 60 Hz, Single Phase to a rectifier and speed control, 90 VDC (60 Hz), start current 1. But the encoder will have to be connected to the spindle in a 1:1 ratio in order to make use of the index pulse on the encoder. 4 Finally got the spindle spinning in Pncconf Spindle Open Loop test. position in halshow. Linuxcnc servo spindle encoder with pulleys was created by nilrods I have read a lot of posts about threading and rigid tapping with Linuxcnc. i'm trying to do my best but i hope to find some help here all i want is to read encoder away of pc becouse parallel port is too slow i'm trying to use arduino becouse it's the only hardware available in my country , i built a cnc lathe it works very good but when i do some thread the encoder read well in slow speed under 500rpm but when speed up the encoder out of rang Hi Peter , i'd go for having the index pulse in alignment with one of the encoder slots , i dont expect the counts to reset as if it did positional information would be lost , but i must admit iv'e not checked , i'd expect an internal count to produce the rpm and an internal value to count the indexes and positional count , i. Figure its cheaper to setup the spindle encoder instead of buying a tach tool. I have a signal from the encoder input, but it's really, really large. HAL. It was turning parts a few years The spindle is a brush motor, 115 VAC, 60 Hz, Single Phase to a rectifier and speed control, 90 VDC (60 Hz), start current 1. Time to create page: 0. input-07. 3. sel TRUE (PID #4 gets command from main spindle fb) M101 (sync off) set caxis. The StepConf Wizard can perform the connections for you if you This device is an interface to read incremental encoder meanings with Modbus. input-a seems to trigger ok with the hal meter but does seem to be a little erratic (that could be down to the encoder wheel slots) hm2_5i25. The net spindle-enable motion. spindle-on => parport. how do I connect the spindle encoder to the "DRO" on the GUI? my pins are all there in the HAL file, but im sure there is another file that needs one or more of the hal pins the lower main panel is the actual The G code manual for g76 and g33 mention "The pins motion. Hi, I'm having trouble navigating the options for spindle position feedback for a lathe conversion. 66 #servo-encoder counts 10. I have the mill up and running with a mesa 5i25/7i76 combo and I would like to know spindle rpm. revs net spindle-velocity encoder. spindle-at-speed and the encoder. The output of the PID is added to the commanded spindle RPM and then fed into the pwmgen as the value of the pwm. This may be doable with a proximity sensor on the spindle that either functions as and index or as index mask for the actual encoder index. pdf (LinuxCNC V2. Wondering if anyone has done one of Spindle encoder (for Should the 12. spindle-index-enable # connect the HAL encoder inputs to the real encoder. I checked the speed and it was correct when I calculated it. This spindle RPM is connected to the feedback pin of a HAL pid component. 4. They may or may not have an index pulse. # ----- # Closed Loop Spindle Control # ----- # Initialize the encoder (spindle) loadrt encoder num_chan=1 addf encoder. spindle-reverse are controlled by M3 and M4. a basic single-pulse type) to my spindle for realtime RPM and maybe rigid tapping. spindle-revs is scaled in spindle revolutions (1. Not sure how motenc driver scales the encoders, but If you have a 1024 line encoder, the encoder scale should probably be 4096 so that motion. Checking the voltage levels at the encoder inputs as Andy mentioned is a good way to check. The following user(s) said Thank You: motion sets spindle. This will yield the most accurate rpm readings of the tool. spindle. My existing system uses an encoder connected to a Mesa 7i76. spindle-at-speed <= near. The MPG on my control panel is hooked to the 7I84. 04, and the input pin 15 is correctly receiving the spindle index signal (I checked it with the HAL Meter and HAL Scope - cool features) Threading on a CNC lathe requires a spindle encoder so the tool makes consistent pitch passes. +-10% or so speed variations should not cause any issues at all. component spindle_index_enable "Enable spindle index after M5 (brake-on)"; pin in float rpm_in; Im having trouble getting my Cnc lathe to work with an encoder. 0. For spindle synchronized motion (at least with LinuxCNC), you need an index that only occurs once per spindle rotation. 5 times more # set the HAL encoder to quadrature counting using A and B. I am using a mesa 7i76e and linux to control a 2 axis lathe, I recently was able to set up a new spindle encoder on the machine and was able to get a bit of help from the mesa team to get the encoder working. The drive isn't able to "forward" the encoder signals as far as I understand. in2 net spindle-at-speed motion. do-pid-calcs servo-thread setp pid. My servo motor has 56 teeth and the spindle has 22 teeth. Regards You need the encoder. It supports enc It's tested on 1000PPR encoder and it reads correct values on about 1000RPMs on internal 8MHz ATtiny2313 RC oscillator, and about 2000PPM on 16MHz crystal. I will need to be able to index Should it be 3 channels if the encoder is A, B and Z? Does the Spindle Motor page not have enough specifications to calibrate the spindle motor and encoder, positioning and or indexing, constant surface feet and accurate RPM and GUI feedback? LinuxCNC_Documentation. This is similar to that control feature found on Bridgeport Interact TNC's amongst I'd like to add an encoder (e. LinuxCNC can control up to 8 spindles. position => motion. 100 # Set the HAL encoder to non-quadrature simple counting using A only. Die Beispiele unten beziehen sich alle auf eine Einspindelkonfiguration mit Spindelsteuerungspins mit Namen wie spindle. Spindle Encoder was Spindle Encoder. which encoder is supported by linuxcnc. 7 amp, full load current 0. The difficulty with a lathe spindle is that it has a big hole in the middle, so you either need an encoder with a big hole, or a belt / gear drive with a 1:1 ratio or to make your own encoder. 00 For axis. Igain Looking for some additional information about selecting a spindle encoder for rigid tapping. 25 Aug 2022 21:24 #250459 by drummond. enable # The standard Denford Orac position disc has 48 pulses per revolution setp encoder. Configuration 5i25 and 7i77 for X Y Z A and spindle control. Lathe Spindle Encoder. I am trying to set up a cnc lathe with an MPG to select and move axes. . scale [SPINDLE_9]ENCODER_SCALE # set the HAL encoder to quadrature simple counting using A & B. Spindle Encoder. The encoder works up to 2250rpm. My mill has an encoder on the spindle (1024 ppr in quadrature). I picked up a buck converter and have the MPG encoder wired to TB5 16 and 17. 7. if you are using both A and B lines from the encoder (quadrature) you will have 400 counts per turn so the scale should be 400 not 100 EDIT I see you are using only A and index so 100 is correct for counter mode. As soon as the drive acts up, LCNC will try to compensate and the drive will fight LCNC. The The driver for the spindle is using that to control the spindle. I've done threading (g76) with this setup before Here I use the encoder scale and should not Linuxcnc show and run the spindle at the wrong speed if the settings are not correct? As it is now I just pass it through the scale component but still spindle-fb-rpm show the right speed even though the scale is 1. Also upon what encoder you have and how it is connected. 3 with Ubuntu 10. spindle-at-speed to true when the spindle is at the commanded speed. There's even a magnet on The pin is set to 1 before the beginning of the threading pass, then the encoder sets it to zero and zeros the position output (motion. 2, is this the reason why the orient not working ? BTW,"for M19 'spindle. spindle-speed-in If the tachometer output is a frequency output proportional to spindle speed then an encoder is the proper way measure this frequency and present it as a hal pin Many 7I93 configurations include one or more hardware encoders Since LinuxCNC can read the velocity (and filter/display it locally) and has a full floating point PID with FF2,FF1 I am a new convert to EMC2 ( from TurboCNC) , so my lathe also has a one/rev spindle indexer installed. Note that spindle-revs is "revolutions" not "rpm". 4-23-g93a844ef5, 2022-12-01) Page 678 However, I am still puzzled as to how I can get the whole thing added when the spindle turns. loadrt encoder num_chan =1; addf encoder. in net spindle-fb-rpm-abs-filtered lowpass. Can LinuxCNC cope with a pulley ratio on the spindle? IE if I setup a belt drive with a 1:2 ratio can I inform LinuxCNC of that and the encoder pulses will be read accordingly? 2) Use a brushless DC motor and a The filter in the hardware is optimised for 10Hz setp pwmgen. The encoder is installed and seems to be working perfect. Marked the spindel, did one rotation, value was 0. 00. Die Anzahl wird in der INI-Datei eingestellt. I don't have a solution, but I have the same probe that I will soon be integrating into LinuxCNC, however mine is NC, not NO. phase-Z for the spindle must be connected in your HAL file". normally this is run by a regular vector vfd drive, from 0-10v. 3 for encoder scale on the spindle encoder as this would make the spindle encoder velocity pin be scaled directly in RPM with your 8000 count encoders. capture-position servo-thread setp encoder. Options For Wiring On The Encoder. need your help. If you are using the parallel port then you can simply use the or2 HAL component between a velocity-mode spindle stepgen and a position-mode C-axis stepgen and the step-output parallel port pin. I'm hoping for a maximum spindle speed Hi,Thank you ,Aciera. but if someone has 2 encoders as well as the spindle with a 7i76 , i'd love to know how if your wanting 2 mpg's , then I feel the 7i73 pendant is the correct way . phase-A <= hm2_5i25. counter-mode 1 # Initialize the PID loadrt pid num_chan=1 addf pid. or Differential Type ( A+, A- and B+, B-) . 2. on pwmgen. My problem is, that the spindle encoder in my spindle is a 800 teeth gear, so the encoder gives me 3200 A/B pulses/revolution but the driver is limited to 200kHz, which gives a limit of 15000/min (this value can also be found in the manual). I need to add the spindle encoder to my machine. position-scale 1 setp encoder. Spindle Direction If you have direction control of your spindle the HAL pins motion. counter-mode true # Connect the HAL encoder outputs to LinuxCNC. LinuxCNC kann bis zu 8 Spindeln steuern. More specifically, I would like to use my DMM servo for rigid tapping without having to add an additional encoder directly to the spindle. comp return-to-last-position move. Over that speed Halmeter I've started looking into the spindle encoder upgrade again now that the machine is up and running with LinuxCNC. hal file correct and the ini file to take full advantage of the encoder. 0 servo-thread # connect one input to the commanded spindle speed net spindle-cmd => near. g. The hardware encoder is wired to the these three nets: spindle-encoder-pos, spindle-encoder-vel, spindle-encoder-vel-rpm So, a search for "linuxcnc spindle orient" does not find that github page. out => lowpass. . LinuxCNC can use the encoder to position the motor. I currently have the spindle configured to Turn ON, CW rotation, and CCW rotation via Outputs on Hmm, comment out that line, then start LinuxCNC. I thought at one point I had this questioned answered but no clue. spindle-speed-in net spindle-index-enable encoder. encoder. With a direct spindle encoder he could, in theory, attach a stepper motor to the pulley adjustment wheel and have LCNC start the main motor and a gentle setp hm2_5i25. 0 : ENCB+ index-enabl Can I connect this : net spindle-velocity hm2_5i25. motion sees that the pin has gone to zero and starts the threading move, synchronised to the encoder position output. 6 existieren. Pgain 0 setp pid. Igain Optocouplers are connected to spindle encoder A/B/I inputs. spindle-speed-in Spindle feedback is needed by EMC to perform any spindle coordinated motions like threading and constant surface speed. step scale -10000 General LinuxCNC Questions. What type of Encoder needed for spindle. where the single ended encoder got its current from the 7I96S. pin-11-in 2. Is it possible in linuxcnc. And i like +-10V mode a lot so i try to use them whenever i can as this way Linuxcnc has full control. I'm trying to determine which is the best spindle encoder to use. (not sure if index is needed for rigid tapping) With a 1 line = 4 count encoder (1/2 circle interrupter and 2 90 degree spaced sensors) A and Index can be the same so only 2 Hi Bengt, thanks again fo the reply. on' is false 'spindle. so i checked hm2_7i76e. My Encoder is Driven 1:1 to the Spindle. When the encoder resolution, I'm unsure. This seems to be working fine for me and my particular use case: high speed spindle with encoder. 1. update-counters base-thread addf encoder. But of course I also want to use the spindle with higher speeds up to 24000/min. pin-14-out 4. I have a few questions regarding my spindle rotary encoder installation; I can't seem to get it to work. 01 For the encoder spindle thread enc: ENCA+ phase A IDX + index For the encoder HOME USE_INDEX axis. Even if you add an encoder directly to the spindle and LCNC is put in closed-loop, tuning will be a nightmare. spindle-speed-in Reset main spindle encoder to 0 (to stop the sub trying to catch-up) set caxis. I want to use spindle in synchronize mode with all other axis feedrate. the encoder is in place and the speed is the effective one, I don't understand what it can be. Linuxcnc servo spindle encoder with pulleys was created by nilrods Most seem to discuss making sure you have at least an index pulse(for threading) and quadrature for rigid tapping. e 4 index counts and 450 encoder counts = 4 turns of 360 Encoder zero should be the one on the 7I96S if I remember it correctly, then it goes on with the 7I85S. The StepConf Wizard can perform the hm2_5i25. Time base for all graphs are the same. hal files All the other axis are x,y,z. sub. 0 : encoder. So I have set it up to use encoder 03 as spindle controller. Not at all a LinuxCNC question, but does anybody know a good way of mounting a spindle speed sensor to a Bridgeport 2J head? - Page 2 LinuxCNC Forum. spindle-on FALSE (switches to PID #3 - velocity mode) set mux2. Lathe Spindle Encoder Start; Prev; 1; Next; End; 1; drummond; Offline; Junior Member More. I have the lathe running under EMC2. Then I can select the correct pins in Stepconf on LinuxCNC and get it all running at the correct RPM's. 02 # Use ACTUAL spindle velocity from spindle encoder # spindle-velocity bounces around so net spindle-fb-rpm scale. phase-Z net spindle-phase-a <= parport. position => spindle. Whats the recommended wiring for a Quadrature Encoder on a Mesa 7I76 for Turning & Accurate Threading? Searching gives conflicting/confusing info but most say all ya need is A+, ZR+, Common, & +5V Some say B+ Also? Some say just A+, A- and Some sites say if reversing Linuxcnc maybe able to control the VFD and close the loop for positioning purposes. I have a homemade lathe and I would like to be able to thread with it, so I need to purchase an encoder for the spindle. 0 # ----- # Closed Loop Spindle Control # ----- # Initialize the encoder (spindle) loadrt encoder num_chan=1 addf encoder. mux2 #1 to connect main spindle encoder position to subspindle stepgen position-command mux2 #2 to switch sub stepgen-type from velocity to position mode Now the main spindle accel/decel PID doesn't matter as the It is likely that a "wcomp" or "near" component is being used to compare the spindle speed feedback from the encoder to the commanded speed, but it is probably looking at the absolute version of the commanded speed. The commanded spindle RPM is connected to the command pin of the PID. This is intended as a spindle encoder but can be used for other purposes. no encoders, or just an inductive 2 pulse per turn encoder to feed back the true speed. Sorry to be a pain, but I am new Linuxcnc and the spindle encoder is the part I was worried about when upgrading from Mach3. Optocouplers are connected to spindle encoder A/B/I inputs. hullo this is more a hardware side question, not so much the orient function inside linuxcnc how would one go about orienting a induction motor spindle - a 24000rpm little router spindle in this case. position-scale 6666. pin-10-in net spindle-index <= parport. 7i77. spindle-speed-in # connect the HAL encoder inputs to the real encoder. I also have the toolsetter accessory that goes with an identical second probe, which comes with a slightly weaker spring, so you can set the spindle probe length with the toolsetter. I have a 3-axis mill with steppers, linear encoders, Mesa 7i76e and 7i85 cards and a VFD driven spindle motor. orient' is true ",that's the exact situation while I runned M19,but still My Encoder is Driven 1:1 to the Spindle. [code]# load a near component and attach it to a thread loadrt near addf near. The X and Z axes calibration seems okay. counter-mode false # connect the HAL encoder outputs to LinuxCNC. 85 amps I have a Encoder On the Lathe and getting my wiring plan done for the 7I76 will be using Path Pilot with a Hitachi WJ200 VFD. hal file for setting up the MPG and Linuxcnc gives me a problem on loading. I've manually set the scale for the spindle to 1000, but I don't know if I'm setting scale for the encoder or the spindle output. The image shows a 3/8-16 thread that was cut with EMC2. This is what allows LinuxCNC to "gear" the Z motion to the spindle rotation. 102 seconds Powered by Kunena Forum. The spindle encoder would be hooked to the 7I76 board. The Z feed IS synchronised to spindle speed, but how well this is done depends upon what spindle encoder you have. Planning a mach to linuxcnc conversion and with a ton of help here have made it up to the spindle encoder. If you were 7I76 OPERATION ENCODER INTERFACE The 7I76 provide a one channel encoder interface with index. Now comes the problem: How do I make my LinuxCNC computer read this encoder for position feedback. Cheap and easy. # Generated by PNCconf at Wed Mar 5 16:38:09 2014 # If you make changes to this file, they will be # overwritten when you run PNCconf again loadrt trivkins loadrt [EMCMOT]EMCMOT servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[TRAJ]AXES loadrt probe_parport loadrt hostmot2 loadrt hm2_pci config=" num_encoders=1 # load real time a limit2 and a near with names so it is easier to follow loadrt limit2 names=spindle-ramp loadrt near names=spindle-at-speed # add the functions to a thread addf spindle-ramp servo-thread addf spindle-at-speed servo-thread # set the parameter for max rate-of-change # (max spindle accel/decel in units per second) setp spindle-ramp. Max spindle RPM : 5000 RPM Spindle control: Hitachi VFD Basic lathe threading support (spindle synchronized motion) is now in EMC2. And sure higher resolution encoders allow better tracking but 400 edges per turn is normally plenty for threading and rigid tapping, even a considerably lower resolution encoder can work well especially on a lathe because a lathe spindle typically has a large amount of inertia so even with variable loads the spindle speed doesn't change much between encoder edges I can get 12-24 custom encoder wheels with 500ppm and an index made for about 800 dollars and turn an adapter that can attach to the spindle, but I only need one encoder and that price is twice as much as a decently high end, chassis mount encoder. It will have to share the signal coming out of the encoder. Most seem to discuss making sure you have at least an index pulse(for threading) and quadrature for rigid tapping. Have you verified index operation? To verify index operation, start LinuxCNC with the spindle drive disabled (motor / VFD unplugged) then from a terminal window, type: halmeter signal spindle-index-enable halcmd -kf The spindle is a brush motor, 115 VAC, 60 Hz, Single Phase to a rectifier and speed control, 90 VDC (60 Hz), start current 1. The number is set in the INI file. The lathe already has an encoder set up for spindle index and 100 pulses per rev, but i add this custom. Spindle speed Sn must be set to a positive non-zero value for M3/M4 to turn on spindle motion. 2. A search for "linuxcnc orient" finds (4th hit) your second link. Currently the machine has a disc with a single slot net spindle-enable motion. 05 Apr 2023 06:01 #268318 by Sourabh3. counter-mode false # connect the HAL encoder 1) Use a brushed DC motor (treadmill motor) and add an encoder. In your last # load the real time modules limit2 and near with names so it is easier to follow their connections loadrt limit2 names = spindle-ramp loadrt near names = spindle-at-speed # add the functions to a thread addf spindle-ramp servo-thread addf spindle-at-speed servo-thread # set the parameter for max rate-of-change # (max spindle accel/decel in units per second) setp # load the real time modules limit2 and near with names so it is easier to follow their connections loadrt limit2 names = spindle-ramp loadrt near names = spindle-at-speed # add the functions to a thread addf spindle-ramp servo-thread addf spindle-at-speed servo-thread # set the parameter for max rate-of-change # (max spindle accel/decel in units per second) setp I have a functioning Sherline 4410 lathe configuration with a 1000 ppr differential abz spindle encoder, which I've wired to a Mesa 7i96. At full speed, that is about 680 pulses per second, or 1 pulse every 1. Lathe Spindle Encoder was created by drummond. spindle-speed-in net i'm trying to do my best but i hope to find some help here all i want is to read encoder away of pc becouse parallel port is too slow i'm trying to use arduino becouse it's the only hardware available in my country , i built a cnc lathe it works very good but when i do some thread the encoder read well in slow speed under 500rpm but when speed up the encoder out of rang The encoder is on the motor side and this encoder drives the RPM loop, thus following a belt change the rpm at the spindle is incorrect as the encoder scale is incorrect for the other belt ratio. 85 amps Looking to add a spindle encoder to my Bridgeport boss5 with a mesa 5I25/7I76/7I84 setup. Before upgrading to the 7I92TF I had the spindle tachometer working well and displaying RPM in LinuxCNC with the control computer parallel port connected directly to the G540, so I know the tachometer is working as intended. maxv 60 # hijack Not aware of any tracking errors. In your last picture you have posted a cad diagram with the A and B pulse being binary opposite to each other e. The G33 syntax is subject to change. Does the encoder count up when the spindle is turning in the forwards direction? 2. spindle-revs net spindle-velocity encoder. The spindle is assumed to have stopped in an arbitrary position. Spindle feedback is needed by EMC to perform any spindle coordinated motions like threading and constant surface speed. out => abs. index-enable <=> motion. 9V to 0v motion sets spindle. At that point the Z axis is slaved to the encoder position until the finish-Z is reached. However, I don't know exactly how to start. The following user(s) said Thank You: I make two encoders : For spindle : encoder. More curious to see if I modified the . What is the right way to configure the controls so M19 command could be executed? Spindle has 2048 pulses differential encoder. I might have a bad decoder, I may have wired it up wrongly. From what I have gathered. The driver for the spindle is using that to control the spindle. The documentation for which, shows a maximum response frequency of 100kHz. dither-pwm true net spindle-enable spindle. index-enable to TRUE at the beginning of a spindle-synchronised move. out To this: # Use ACTUAL spindle velocity from spindle encoder # spindle-velocity bounces around so we filter it with lowpass I make two encoders : For spindle : encoder. The BIAS 160 and OUTPUT_MIN_LIMIT = 0 accelerating the spindle the RPM offset increases and decreases as the spindle nears maximum RPM. index-enable not found I think I need to add the information for the spindle encoder in my IO and motion. my servo loop had been 1khz Working on the design and implementation of my spindle setup the last few weeks, I've realized I will need a spindle encoder of some kind. spindle-on TRUE (switches to PID #4 - position mode) set mux2. It behaves like a Not at all a LinuxCNC question, but does anybody know a good way of mounting a spindle speed sensor to a Bridgeport 2J head? Strictly speaking my machine is a BOSS 5 CNC machine which uses a variant of the Now "spindle-revs" zero at machine start up is at an arbitrary position, so I think it is necessary to zero "spindle-revs" once at the indexpoint of my encoder. Have the encoder connected normally. 04. A small AVR controller and a component to connect high precision encoder to LinuxCNC via Modbus RTU - futurelink/linuxcnc-spindle-encoder Are you sure the spindle encoder scale is correct? An easy way to tell is to mark the spindle and hand turn it say 10-20 turns, the spindle encoder position pin should advance by exactly 1 for each spindle turn. Currently the machine has a disc with a single slot I am wondering (please let me know if it’s a crazy idea) if it is possible to do spindle synchronized motion with only a spindle motor encoder, but integer gear ratio. Anybody to has HAL or INI Configuring the spindle motor in pncconf, I can launch the 'Open Loop Test' dialog and one revolution of the spindle = 1 on the spindle encoder position. sel FALSE (PID #4 gets command from normal source) hi, I have the signal spindle at speed active at zero speed and the movement starts without waiting. I have Pico hardware, Jon gave me some additional code to enter in my config files. But when I look in the spindle section of the resulting ini file all that is in there is this: #***** # Spindle #***** [SPINDLE_9] ENCODER_SCALE = 4096. This component is designed to support a spindle orientation PID loop by providing a command value, and fit with the motion spindle-orient support pins to support the M19 code. mux2 #1 to connect main spindle encoder position to subspindle stepgen position-command mux2 #2 to switch sub stepgen-type from velocity to position mode Now the main spindle accel/decel PID doesn't matter as the sub just follows the main, including the caxis. Tomorrow I will start from scratch with the lathe config and generate a new Yesterday i received a new encoder that i mounted directly (with timing belt) to the spindle. The enable and direction optocoupler outputs work, I just don't get any analogue output on SPINDLE OUT pin with an M4 command. So I need a separate way of making the LinuxCNC computer read this encoder. Linuxcnc can use those drives in position mode for axis, but it can also use them in velocity mode for spindle. Thanks for your patience Andy but commenting it out does not let me start LinuxCNC. The spindle on my machine is geared down to 10rpm, at which point it is belted to a 1024 encoder. 9560***. jfofma gursft vfd dir dosfd kddxhwzv rhyq vtxkxf uiusi ipb